Weather forecast accuracy details for Marengo, Iowa

These are the one- to three-day out accuracy percentages for high temperature, low temperature, icon forecast precipitation (both rain and snow), and text forecast precipitation (both rain and snow). Temperature accuracy is the percentage of forecasts within three degrees. Precipitation accuracy is the percentage of correct forecasts. The forecasts are collected in the evening.

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Weather Forecast Accuracy Data Last Month (December)

Provider High Temp Low Temp Icon Precip Text Precip Overall
The Weather Channel   77.42% 75.27% 88.17% 88.17% 82.26%
Weatherbit   66.67% 75.27% 89.25% 91.40% 80.65%
Microsoft   65.88% 67.82% 85.88% 90.59% 77.54%
Foreca/Vaisala   67.74% 69.89% 83.87% 83.87% 76.34%
AerisWeather   68.82% 67.74% 84.95% 83.87% 76.34%
AccuWeather   66.67% 72.04% 81.72% 79.57% 75.00%
NWS Digital Forecast   68.82% 66.67% 76.34% 76.34% 72.04%
Wetter.com   55.91% 52.69% 89.25% 89.25% 71.77%
World Weather Online   49.46% 60.22% 84.95% 84.95% 69.89%
Open-Meteo   66.67% 52.69% 75.27% 75.27% 67.47%
Pirate Weather   63.44% 29.03% 88.17% 88.17% 67.20%
OpenWeather   66.67% 46.24% 75.27% 75.27% 65.86%
Persistence   30.26% 19.74% 63.16% 63.16% 44.08%

Weather Forecast Accuracy Data Last Year (2024)

Provider High Temp Low Temp Icon Precip Text Precip Overall
The Weather Channel   78.84% 75.09% 89.89% 89.89% 83.43%
Foreca/Vaisala   74.16% 72.75% 87.92% 87.92% 80.69%
Microsoft   76.43% 72.12% 85.42% 87.28% 80.31%
AccuWeather   74.55% 74.62% 84.43% 83.57% 79.29%
Weatherbit   76.02% 71.86% 83.63% 83.92% 78.86%
AerisWeather   73.31% 68.91% 86.14% 85.86% 78.56%
NWS Digital Forecast   73.84% 69.67% 78.08% 78.08% 74.92%
Pirate Weather   73.22% 39.33% 86.24% 86.24% 71.25%
Wetter.com   57.12% 52.43% 79.59% 79.68% 67.21%
World Weather Online   54.96% 50.56% 76.97% 76.97% 64.86%
OpenWeather   56.09% 41.29% 78.93% 78.93% 63.81%
Persistence   33.52% 26.56% 62.99% 62.99% 46.51%

If this data feeds your inner weather geek, you'll probably be interested in the amazing amount of weather data available from ForecastWatch. Likewise, if you're looking to assess your own forecasting accuracy or would like to make more informed decisions about a weather provider you're considering or already use, we can provide data to help you.

The data here is calculated from forecasts and observations collected and analyzed by ForecastWatch. If you would like more information about the methods, scientific approach, and the quality controls employed to ensure the data and analyses are of the highest quality, please read this overview.

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